They must have hit a serious problem here, either technological or financial, as I can't believe that JC hasn't finished writing.

Can't believe this has happened, terrible news!

BOMBSHELL.

From one of the reports: -

"This will be crushing news to all of those people that suffered from Pandora withdrawal/depression after watching the first movie. Looks like it will be a long time before Sam Worthington and crew head back to that particular alien planet."

Well, the way I see it, the more time they have to work on it, the better the chance they'll get it right. Avatar is one of those things where to me, the amount of concern that should be devoted to quality vs. time required to make the film is skewed very heavily towards quality.

Ha, nice optimism there BotanicalMedley.
I'm with Crickett on this one. Maybe I'd feel differently if the first one had some kind of cliffhanger ending with no closure whatsoever, but I can be perfectly content with Avatar for as long as I have to be.